21 weeks pregnant with high WBC count.

Hi, I'm pregnant with my second baby. Had normal delivery with out any complications with my first pregnancy. In this pregnancy I have low lying placenta detected in 4 th month due to vaginal bleeding. Was admitted in hospital and given trapic, susten and proluton and then had 2 weeks black discharge which was a retroplacental collection dissolving. All of it is now solved with bedrest. I'm now 6 months pregnant and got my cbc , thyroid tests done. Last time my cbc report WBC was 15000 so I took antibiotic course it again after a month its still more than 15000 due to which absolute neutrophils count is also above 12000 and haemoglobin is 11.5 and mean platelet is 11. Is it due to pregnancy or due to yeast fungul infection or decay tooth? My docter gave me candid cl for 3 days to take vaginally along with ecoflora probiotic capsules. Kindly advise.